Saw-filing machine



(No Mode1.)

J; W. GREEN.

SAWPILINGMAGHIN'B.

No. 415,106. Patented Nov. 12,1889.

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' NITED -STATES PATENT OF ICE.

JAMES \VM. GREEN, OF ALBINA, OREGON.

SAW-FILING MACHINE.

SPECIFICATION forming part of Letters Patent No. 415,106, dated November12, 1889.

Application filed July 22, 1889. Serial No. 318,297- (No model.)

To all whom it may concern:

Be it known that-I, JAMES IV. GREEN, a citizen of the United States,residing at Albina, in the county of Mult-nomah and State of Oregon,haveinvented a new and useful Saw-File, of which the following is aspecification.

This invention relates 'to an improved de vice for filing saws; and itconsists of a cylindrical file having one or more spiral threads adaptedto engage and operate upon the teeth of a saw, which, while acted uponby the file, is automatically moved forward, thus causing the teeth tobe sharpened more evenly and accurately and much more rapidly than canbe done by means of a file of the ordinary des'cription.

The invention consists, mainly, in the im proved construction of thesaid file and incidentally in the frame for holding and operating thesame, as will be hereinafter described, and pointed out in the claim.

In the drawings, Figure 1 is a side view of a saw-file embodying myimprovements. Fig. 2 is an end view of the same. Fig. 3 isa top viewshowing the same arranged in a frame having mechanism whereby it may beoperated. Fig. 418 aside View of the device shown in Fig. 3, and Fig. 5is a top View showing a saw in position for being filed.

The same parts in the several figures are indicated by like numerals ofreference.

In the drawings, 1 designates the cylindrical body of my improved file,which is provided with one or more spiral threads or flanges 2 2, whichin section are shaped to fit the teeth of the saw for which the file isspecially adapted,

and which are toothed or serrated in the manner in which saw-files areusually constructed.

With regard to the detailed construction of the file I would here haveit understood that I do not limit myself either with respect to thenumber of spiral flanges or to the particular shape of said flanges,inasmuch as these features will necessarily have to be varied, accordingto the kind and character of saw for which the file is adapted. Thus forfine crosscut-saws one kind of spiral flanges would be required, whilefor rip-saws flanges of entirely different construction would bepreferable. Neither do I deem it necessary to explain in detail theconstruction of said flanges,

inasmuch as this will be readily understood by any one skilled in theart to which the invention appertains. Again, the flanges in some fileswill be in the form of right-hand spirals, while in others the spiralswill be left hand. Thus for the purpose of filinga crosscut-saw twofiles-one right and one left handed-would be employed to properly filethe alternate teeth of such saw.

polygonal stud 10, adapted to engage the correspondingly-shaped socket11 in the front end of the cylindrical body 1 of the file. The rear endof said body is provided with a recess 12, adapted to be engaged by apintle 13 at the front end of a shaft 14, mounted to slidelongitudinally in a box or bearing 15 upon the bed-plate 3. A set-screw16 in said box serves to retain the shaft 14 in any position to which itmay be adjusted.

It will be seen that the described construction of the frame enables thefile to be placed in position for operation in a moments time, and thatby operating the crank 8 a rotary motion will be imparted to the saidfile. The shaft 7 may be driven by hand by means of the crank 8, or itmay be geared in any suitable manner to any convenient source at all.

.The bed-plate 3 is provided on its upperside with shoulders 17, againstwhich the saw may be rested while it is being operatedupon by the file.

The operation of the invention will be readily understood from theforegoing description,-

taken in connection with the drawings hereto annexed. The saw which isto be operated upon is placed with its teeth at one end in engagementwith the file, which latter is then revolved in the manner described.The saw will thus be caused to travel along the file, whereby the teethare sharpened evenly and accurately. The operation may be repeated asoften as may be deemed necessary.

The construction of my improved saw-filing device is exceedingly simple,and it is capable of being operated by an unskilled person withsatisfactory results.

Having thus described my inventiomwhatl claim, and desire to secure byLetters Patent, 1s-- As an improvement in saw-filing devices, thecombination, with a frame comprising a bed-plate having shouldersorguides,a shaft} mounted permanently in bearings upon said bed-plateand having, a pinion afloneehd'a longitudinally-movable shaft mounted ina bearing in said bed plate in 'aline "with the axis of the permanentshaft; a l ate'rally e'x-e set forth.

tending bracket, and a counter-shaft jour- "naledinsaid bracket andhaving a crank at tween the permanent and the adjustable shaft-s,substantially asand for the purpose In testimony that I claim theforegoing as my own I have hereto alfixed my signature in presence oftwo witnesses.

JAMES WM. GREEN. .Witnesses:

E. THOMPSON, J. -P. MENEFEE.

